CN110819037A

CN110819037A - Plain frosted embossed PVC tablecloth and production process thereof

Info

Publication number: CN110819037A
Application number: CN201911149875.7A
Authority: CN
Inventors: 刘承发
Original assignee: DONGGUAN IUIU HOUSEHOLD PRODUCTS Co Ltd
Current assignee: DONGGUAN IUIU HOUSEHOLD PRODUCTS Co Ltd
Priority date: 2019-11-21
Filing date: 2019-11-21
Publication date: 2020-02-21

Abstract

The invention relates to the field of household articles, in particular to plain frosted embossed PVC tablecloth and a production process thereof, wherein the production process comprises the following steps: s1: preparing a plain frosted PVC base layer; s2: manufacturing a printing film; s3: embossing, namely manufacturing an embossing pattern on the surface of the plain PVC base layer through an embossing machine; s4: laminating and transferring, namely laminating the printing film and the plain frosted PVC base layer subjected to embossing treatment at a high temperature, transferring the printing pattern on the printing film to the plain frosted PVC base layer, and ensuring the accurate registration of the embossing pattern and the printing pattern; s5: performing surface brightening treatment on the plain frosted PVC base layer subjected to attaching and transferring; s6: and (6) rolling. The surface of the tablecloth is plain, is frosted, dirt-resistant, waterproof and oil-proof, easy to clean, attractive in appearance, high in atmosphere, safe and environment-friendly.

Description

Plain frosted embossed PVC tablecloth and production process thereof

Technical Field

The invention relates to the field of household articles, in particular to plain frosted embossed PVC tablecloth and a production process thereof.

Background

The tablecloth is an article which is covered on a table or a tabletop and used for preventing dirt or increasing the appearance. The plastic material is classified according to production process and mainly divided into two major types, namely plastic type and textile type, wherein the plastic type comprises polyvinyl tablecloth such as PVC tablecloth, EVA tablecloth, PEVA tablecloth, pyrograph tablecloth, cotton substrate PVC tablecloth and PP tablecloth, and cast film tablecloth. The PVC tablecloth is widely applied to daily life due to the reasons of easy cleaning, convenience, practicability and the like.

Most of the plastic PVC tablecloths are white and transparent, and have the following defects: on one hand, the rice is not dirt-resistant, once the sauce vegetable juice rice grains are stuck on the tablecloth or dust is smeared on the tablecloth, a great deal of energy is consumed to clean the rice grains; in the second aspect, for consumers pursuing high-grade taste, the white and transparent tablecloths are common, and the surfaces of the tablecloths are mostly mirror surfaces, so that the requirements of the high-grade taste consumers cannot be met.

Disclosure of Invention

In order to solve the problems, the invention provides the plain-color frosted embossed PVC tablecloth which is plain-color in surface, frosted, dirt-resistant, waterproof and oilproof, easy to clean, attractive in appearance, high in atmosphere, safe and environment-friendly, and the production process thereof.

The technical scheme adopted by the invention is as follows: the production process of the plain frosted embossed PVC tablecloth comprises the following steps: s1: preparing a plain frosted PVC base layer; s2: manufacturing a printing film; s3: embossing, namely manufacturing an embossing pattern on the surface of the plain PVC base layer through an embossing machine; s4: laminating and transferring, namely laminating the printing film and the plain frosted PVC base layer subjected to embossing treatment at a high temperature, transferring the printing pattern on the printing film to the plain frosted PVC base layer, and ensuring the accurate registration of the embossing pattern and the printing pattern; s5: performing surface brightening treatment on the plain frosted PVC base layer subjected to attaching and transferring; s6: and (6) rolling.

The technical scheme is further improved in that in S1, raw materials of the plain frosted PVC base layer comprise, by mass, 35-75 parts of dioctyl phthalate, 20-80 parts of PVC resin powder, 50-80 parts of calcium carbonate filler, 10-20 parts of matting resin, 2-5 parts of OBSH foaming agent, 2-3 parts of natural rubber, 1-3 parts of paraffin, 0.02-0.3 part of heat stabilizer, 0.02-0.3 part of monochromatic powder and 0.01-0.2 part of processing aid; the manufacturing method of the plain frosted PVC base layer comprises the following steps: uniformly stirring the raw materials in parts by mass, repeatedly calendering until the color of the raw materials is uniform, continuously heating the soft raw material mass obtained after calendering for primary plasticization to obtain colloidal particles, heating for secondary plasticization of the colloidal particles, and carrying out calendaring molding, cooling and shaping on the colloidal particles subjected to secondary plasticization to obtain a foamed PVC layer; the oil content of the PVC resin powder is controlled to be between 75 Pa and 85 Pa, and the thickness of the plain frosted PVC base layer is between 0.25mm and 1.00 mm.

The technical scheme is further improved in that in S2, the printing film comprises a PET substrate layer, a pattern layer, a water-based release agent layer and a high-temperature resistant layer; the high-temperature-resistant layer is a high-barrier thin film, the pattern layer is printed on the surface of the PET substrate layer through a gravure printing process, and the water-based release agent layer comprises 55% of deionized water, 35% of modified water-based acrylic resin, 5% of ethylene glycol, 4% of a cross-linking agent and 1% of a defoaming agent in parts by mass.

The technical scheme is further improved in that in S3, the temperature of the back pressure roller of the embossing machine is 7-10 ℃, the rotating speed is 4-8 m/min, the traction tension is 2.5 kg/cm-3.5 kg/cm, and the coiling speed is 60-90 m/min; the preheating roller temperature is between 75 ℃ and 100 ℃, the embossing roller temperature is 5 ℃ to 10 ℃ higher than that of the preheating roller, the embossing roller rotating speed is 4m/min to 8m/min, the traction tension is 2.5 kg/cm to 3.5 kg/cm, and the coiling speed is 60m/min to 90 m/min; in the embossing process, during the embossing process, the embossing roller frozen water circulation is realized, the temperature is 6-8 ℃, the pressure is 7.5 kg/cm-8.5 kg/cm, the rotating speed is 10-25 m/min, and the device can move left and right by 10-20 mm and swing up and down by 8-15 mm through manual adjustment.

The technical scheme is further improved in that in S4, the attaching and transferring process comprises a first attaching device and a second attaching device, the temperature of the first attaching device is 120-150 ℃, the rotating speed of a preheating roller is 7-9 m/min, the traction tension is 2.5 kg/cm-3.5 kg/cm, and the coiling speed is 60-90 m/min; the temperature of a cooling roller of the first laminating device is 8-10 ℃, the breadth shrinkage is less than or equal to 1cm, the rotating speed is 7-17 RPM/min, the low-speed rotating speed is 3-13 RPM/min, and the high-speed printing speed is 15-25 RPM/min; the temperature of the second laminating device is 180-190 ℃, the laminating time is 40-45 s, the traction tension is 3.0-4.0 kg/cm, the coiling speed is 20-25 m/min, the cooling group of the second laminating device comprises four groups of cooling rollers, the temperature of the first group of cooling rollers is 2-8 ℃, the cooling group is cooled and shaped for four times, the linear speed of each group is increased by 2-3 ℃ in sequence, and the cooling group is synchronized with the embossing rollers.

The technical scheme is further improved in that in S3, the printing film and the white PVC base layer are bonded through a first bonding device and a second bonding device and then enter a vat to operate, the vat operating temperature is 180-200 ℃, a stainless steel heating tube is installed in the vat, the temperature is kept at 200 ℃, the lifting stroke is 20-30 cm, the total number of the stainless steel heating tubes is 24, the power is 3000w, and heat is conveyed to the vat through high-temperature heat conduction oil closed circulation.

The technical scheme is further improved in that in the transfer attaching process, in the step S4, the embossed pattern and the printed pattern are accurately registered through the superposition of the contour positioning of the embossed pattern and the contour positioning of the printed pattern.

The technical scheme is further improved in that in S5, the brightening treatment method comprises the steps of conveying a finished product after the laminating is finished to a printing machine, coating UV on the surface of the finished product, adding urea and glycerol into UV slurry, wherein the proportion of the urea to the glycerol is (3-5) to (3-4), the proportion of the urea to the glycerol in the whole UV slurry is 3-12.5%, and drying; in S6, in the winding process, pressures of a rubber winding roller, a silicone winding roller and a bending winding roller are all 3 kg/4 kg/cm, winding traction tension is 2.5 kg/3.5 kg/cm, and winding speed is 10 m/min-25 m/min.

The technical scheme is further improved in that in S1, the raw materials of the plain frosted PVC base layer comprise, by mass, 66 parts of dioctyl phthalate, 68 parts of PVC resin powder, 52 parts of calcium carbonate filler, 6 parts of matting resin, 3.5 parts of OBSH foaming agent, 2.5 parts of natural rubber, 1.5 parts of paraffin, 0.15 part of heat stabilizer, 0.25 part of single-color powder and 0.1 part of processing aid; the processing aid comprises an anti-aging agent, an anti-ultraviolet agent and a flame retardant; the calcium carbonate filler is a mixture of light calcium carbonate with the particle size of 10-50 mu m and modified by higher fatty acid salt and heavy calcium carbonate with the particle size of 100-500 mu m and modified by higher fatty acid ester in a weight ratio of 0.5-1.5: 1. The heat stabilizer adopts calcium stearate, barium stearate and zinc stearate as main heat stabilizers, adopts hydrotalcite as an auxiliary heat stabilizer, and is compounded with the main heat stabilizer and the auxiliary heat stabilizer.

The plain-color ground and embossed PVC tablecloth is prepared by the production process of the plain-color ground and embossed PVC tablecloth according to any one of claims 1 to 9, and has the integral thickness of 0.4 mm to 1.0 mm and the width of 80cm to 145 cm.

The invention has the beneficial effects that:

1. on one hand, the plain-color frosted embossing PVC tablecloth has the advantages of plain color, frosted surface, dirt resistance, water and oil resistance, easiness in cleaning, attractive appearance, high atmosphere and safety and environmental protection, and can present different plain colors according to different colors of single-color powder, so that the requirements of different consumers can be met. In the second aspect, the process only comprises the working procedures of preparing the plain frosted PVC base layer, transferring, embossing and the like, integrates printing, embossing, rolling and packaging, has high production capacity, low labor, few working procedures, small space and low cost, has simple production process, low production cost and high production efficiency, and is suitable for large-scale mass production.

2. The production raw material of the plain ground PVC base layer is mainly PVC resin powder, and is added with plasticizer dioctyl phthalate, flexibilizer calcium carbonate filler, OBSH foaming agent for promoting PVC resin powder foaming, natural rubber and paraffin for improving PVC resin calendaring formability, heat stabilizer for increasing PVC heat stability, toner for changing color and the like. The OBSH foaming agent has small heat release, is beneficial to controlling the closed-cell foaming of thick-layer PVC and avoids center coking during foaming. The addition of the extinction resin can enable the surface of the prepared tablecloth to have the effect of frosted grains, and the density and the grain thickness of the frosted grains of the tablecloth can be effectively adjusted along with the change of the addition amount, the grain diameter and the polymerization degree of the extinction resin, so that the process is simple. The addition of the heat stabilizer improves the heat stability of the PVC, prevents the PVC from generating chlorine gas to pollute the environment due to high-temperature decomposition, and is safe and environment-friendly.

3. The manufacturing method of the foaming PVC layer is characterized in that the foaming PVC layer is manufactured by adopting modes of twice plasticizing, calendaring molding, cooling and shaping and the like, and the prepared foaming PVC layer has more excellent performances by matching with the selection of raw materials.

4. The oil content of the PVC resin powder is controlled to be 75-85 Pa, the thickness of the plain frosted PVC base layer is 0.25-1.00 mm, the embossing and transfer printing effects of the PVC layer with the thickness are good, and the frosted effect is outstanding.

5. In S2, the printing film comprises a PET substrate layer, a pattern layer, a water-based release agent layer and a high-temperature resistant layer; the high temperature resistant layer is the high barrier nature film, and it sets up the high temperature resistant effect that has increased the tablecloth, prevents that tablecloth surface molecular structure from being destroyed when the high temperature laminating. The pattern layer is printed on the surface of the PET substrate layer through a gravure printing process, and during printing, printing ink is stirred by ink stirring rods every 2-4 min and printing solvents are added, the ink stirring rods rotate orderly and uniformly during working, and the printing nesting tolerance during the pattern printing process is +/-1 mm; by adopting the printing parameter settings, the printing speed is high, the coloring is uniform and stable, the ink adhesiveness is good, the printing alignment is accurate, the printed pattern position is accurate, and the decorative effect is better. The printing group is additionally provided with a high-temperature 8M foaming oven, and the temperature of the oven can be raised to 120-280 ℃, so that PVC can be fully foamed by heat, and the flexibility of the tablecloth is further improved.

6. In S3, various parameters in the embossing machine are set, so that the embossing pattern is clear, the position is accurate, and the embossing effect is good. In the embossing process, the embossing roller is used for freezing water circulation, the temperature is 7 ℃, the pressure is 8 kg/cm, the rotating speed is 15m/min, and the embossing roller can move left and right by 10 mm-20 mm and swing up and down by 8 mm-15 mm through manual regulation. Make the PVC basic unit after the impressed watermark cool gradually, the impressed watermark shaping effect is better, and the setting of rotational speed and pressure simultaneously makes whole production technology keep different sections synchronous, and production efficiency is high. The embossing roller capable of being manually adjusted is provided with a mechanism which is beneficial to ensuring accurate registration of subsequent embossing patterns and printed patterns.

7. In the laminating and transferring processes, two layers of laminating are carried out through two laminating devices, so that the laminating effect of the two layers is better, the embossing effect is accurate in alignment, the obvious third dimension of the layers is strong, and the patterns of the two layers can be accurately positioned. The internal structure of the material is changed through multiple times of high temperature and cooling, the pattern of the product is prevented from fading, and the color fastness of the product is higher.

8. After the two are jointed by two transfer printing, the two are heated, so that the connection between the two is firmer, and the product has good three-dimensional effect.

9. And S4, in the transfer attaching process, the contour positioning of the embossing pattern is superposed with the contour positioning of the printing pattern so as to ensure the accurate registration of the embossing pattern and the printing pattern. The embossing pattern and the printing pattern are perfectly matched, and the patterns on the tablecloth are clearer and fuller, the stereoscopic impression is stronger, and the decorative effect is better.

10. And in the S5, brightening, urea and glycerin are added into the UV sizing agent, the urea and the glycerin have the function of promoting the infiltration, the ductility of the UV sizing agent can be improved, the surface tension is improved, and as the UV is directly coated on the PVC base layer after transfer printing and embossing, the urea has a color development effect, so that the embossing pattern and the printing pattern are clearer, more vivid and full in stereoscopic impression. And when UV is applied, glycerol is better than a solvent and is diffused to the edge of the embossing firstly, and the glycerol is enriched at the edge of the embossing by utilizing the characteristic of large specific gravity of the pigment at the edge of the embossing, so that the halation at the edge of the embossing is eliminated, the color effect of the tablecloth is protected, the glossiness of the PVC surface after embossing is increased, and the decorative attractiveness of the tablecloth is further improved.

11. In S6, in the winding process, pressures of a rubber winding roller, a silicone winding roller and a bending winding roller are all 3 kg/4 kg/cm, winding traction tension is 2.5 kg/3.5 kg/cm, and winding speed is 10 m/min-25 m/min. In the whole production process, the speed of the rolling process and other processes is synchronous, so that the production process of the product is carried out stably and efficiently.

Drawings

FIG. 1 is a process flow diagram of the present invention.

Detailed Description

The present invention will be further described with reference to the following examples.

Example 1:

the production process of the plain frosted embossed PVC tablecloth comprises the following steps: s1: preparing a plain frosted PVC base layer; s2: manufacturing a printing film; s3: embossing, namely manufacturing an embossing pattern on the surface of the plain PVC base layer through an embossing machine; s4: laminating and transferring, namely laminating the printing film and the plain frosted PVC base layer subjected to embossing treatment at a high temperature, transferring the printing pattern on the printing film to the plain frosted PVC base layer, and ensuring the accurate registration of the embossing pattern and the printing pattern; s5: performing surface brightening treatment on the plain frosted PVC base layer subjected to attaching and transferring; s6: and (6) rolling.

In S1, the raw materials of the plain frosted PVC base layer and in S1, the raw materials of the plain frosted PVC base layer comprise, by mass, 66 parts of dioctyl phthalate, 68 parts of PVC resin powder, 52 parts of calcium carbonate filler, 6 parts of matting resin, 3.5 parts of OBSH foaming agent, 2.5 parts of natural rubber, 1.5 parts of paraffin, 0.15 part of heat stabilizer, 0.25 part of single-color powder and 0.1 part of processing aid; the processing aid comprises an anti-aging agent, an anti-ultraviolet agent and a flame retardant; the calcium carbonate filler is a mixture of light calcium carbonate with the particle size of 10-50 mu m and modified by higher fatty acid salt and heavy calcium carbonate with the particle size of 100-500 mu m and modified by higher fatty acid ester in a weight ratio of 0.5-1.5: 1. The heat stabilizer adopts calcium stearate, barium stearate and zinc stearate as main heat stabilizers, adopts hydrotalcite as an auxiliary heat stabilizer, and is compounded with the main heat stabilizer and the auxiliary heat stabilizer.

The manufacturing method of the plain frosted PVC base layer comprises the following steps: uniformly stirring the raw materials in parts by mass, repeatedly calendering until the color of the raw materials is uniform, continuously heating the soft raw material mass obtained after calendering for primary plasticization to obtain colloidal particles, heating for secondary plasticization of the colloidal particles, and carrying out calendaring molding, cooling and shaping on the colloidal particles subjected to secondary plasticization to obtain a foamed PVC layer; the oil content of the PVC resin powder is controlled to be 80 Pa, and the thickness of the plain frosted PVC base layer is 0.85 mm.

In S2, the printing film comprises a PET substrate layer, a pattern layer, a water-based release agent layer and a high-temperature resistant layer; the high-temperature-resistant layer is a high-barrier thin film, the pattern layer is printed on the surface of the PET substrate layer through a gravure printing process, and the water-based release agent layer comprises 55% of deionized water, 35% of modified water-based acrylic resin, 5% of ethylene glycol, 4% of a cross-linking agent and 1% of a defoaming agent in parts by mass.

In S3, the temperature of the back pressure roller of the embossing machine is 8 ℃, the rotating speed is 6m/min, the traction tension is 3 kg/cm, and the coiling speed is 75 m/min; the temperature of the preheating roller is between 85 ℃, the temperature of the embossing roller is 8 ℃ higher than that of the preheating roller, the rotating speed of the embossing roller is 6m/min, the traction tension is 3 kg/cm, and the coiling speed is 75 m/min; during the embossing process, the embossing roller frozen water is circulated, the temperature is 7 ℃, the pressure is 8 kg/min, and the rotating speed is 17.5m/min, and the left and right movement is 15mm and the up and down swinging is 11.5mm through manual regulation.

In S3, the printing film and the white PVC base layer are bonded through a first bonding device and a second bonding device and then enter a vat for operation, the vat operation temperature is 190 ℃, a stainless steel heating tube is installed in the vat, the temperature is kept at 200 ℃, the lifting stroke is 25cm, the total number of the stainless steel heating tubes is 24, the power is 3000w, and heat is conveyed to the vat through high-temperature heat conducting oil closed circulation.

In S4, the attaching and transferring process comprises a first attaching device and a second attaching device, the temperature of the first attaching device is 135 ℃, the rotating speed of a preheating roller is 8m/min, the traction tension is 3 kg/cm, and the coiling speed is 75 m/min; the temperature of a cooling roller of the first laminating device is 8 ℃, the width shrinkage is less than or equal to 1cm, the rotating speed is 12RPM/min, the low-speed rotating speed is 8RPM/min, and the high-speed printing speed is 20 RPM/min; the temperature of the second laminating device is 185 ℃, the laminating time is 45s, the traction tension is 3 kg/cm, the coiling speed is 22.5m/min, the cooling group of the second laminating device comprises four groups of cooling rollers, the temperature of the first group of cooling rollers is 6 ℃, the cooling group is cooled and shaped for four times, the temperature of each group is increased by 2 ℃ sequentially, and the linear speed of the cooling group is controlled and the embossing rollers are synchronous.

And S4, in the transfer attaching process, the contour positioning of the embossing pattern is superposed with the contour positioning of the printing pattern so as to ensure the accurate registration of the embossing pattern and the printing pattern.

S5, the brightening treatment method comprises the steps of conveying the finished product after the gluing to a printing machine, coating UV on the surface of the finished product, adding urea and glycerol into UV slurry, wherein the ratio of the urea to the glycerol is 4:3.5, the specific gravity of the urea and the glycerol in the whole UV slurry is 8%, and drying; in S6, in the winding process, the pressures of the rubber winding roller, the silica gel winding roller and the bending winding roller are all 3.5 kg/cm, the winding traction tension is 3 kg/cm, and the winding speed is 17.5 m/min.

Example 2:

Example 3:

the production process of the plain frosted embossed PVC tablecloth comprises the following steps: s1: preparing a plain frosted PVC base layer; s2: manufacturing a printing film; s3: embossing, namely manufacturing an embossing pattern on the surface of the plain PVC base layer through an embossing machine; s4: laminating and transferring, namely laminating the printing film and the plain frosted PVC base layer subjected to embossing treatment at a high temperature, transferring the printing pattern on the printing film to the plain frosted PVC base layer, and ensuring the accurate registration of the embossing pattern and the printing pattern; s5: and (6) rolling.

Example 4:

In S1, raw materials of the plain frosted PVC base layer, in S1, the raw materials of the plain frosted PVC base layer comprise, by mass, 58 parts of dioctyl phthalate, 78 parts of PVC resin powder, 48 parts of calcium carbonate filler, 8 parts of matting resin, 3.5 parts of OBSH foaming agent, 2.5 parts of natural rubber, 1.5 parts of paraffin, 0.15 part of heat stabilizer, 0.25 part of single-color powder and 0.1 part of processing aid; the processing aid comprises an anti-aging agent, an anti-ultraviolet agent and a flame retardant; the calcium carbonate filler is a mixture of light calcium carbonate with the particle size of 10-50 mu m and modified by higher fatty acid salt and heavy calcium carbonate with the particle size of 100-500 mu m and modified by higher fatty acid ester in a weight ratio of 0.5-1.5: 1. The heat stabilizer adopts calcium stearate, barium stearate and zinc stearate as main heat stabilizers, adopts hydrotalcite as an auxiliary heat stabilizer, and is compounded with the main heat stabilizer and the auxiliary heat stabilizer.

Example 5:

In S1, raw materials of the plain frosted PVC base layer, in S1, the raw materials of the plain frosted PVC base layer comprise 67 parts of dioctyl phthalate, 70 parts of PVC resin powder, 53 parts of calcium carbonate filler, 2 parts of matting resin, 3.5 parts of OBSH foaming agent, 2.5 parts of natural rubber, 1.5 parts of paraffin, 0.15 part of heat stabilizer, 0.25 part of single-color powder and 0.1 part of processing aid by mass; the processing aid comprises an anti-aging agent, an anti-ultraviolet agent and a flame retardant; the calcium carbonate filler is a mixture of light calcium carbonate with the particle size of 10-50 mu m and modified by higher fatty acid salt and heavy calcium carbonate with the particle size of 100-500 mu m and modified by higher fatty acid ester in a weight ratio of 0.5-1.5: 1. The heat stabilizer adopts calcium stearate, barium stearate and zinc stearate as main heat stabilizers, adopts hydrotalcite as an auxiliary heat stabilizer, and is compounded with the main heat stabilizer and the auxiliary heat stabilizer.

And (4) analyzing results:

the physical and chemical properties of the tablecloths produced in examples 1 to 5 were comprehensively evaluated, and it was found that the tablecloth of example 1 had the best properties, and the specific reasons were analyzed as follows:

compared with the embodiment 1, in the embodiment 2, the patterns on the tablecloth are not clear, the color is not full enough, the three-dimensional effect is not achieved, and the problems of the embossing and the pattern non-correspondence are caused. This is because in example 2, the embossed pattern and the printed pattern are not precisely registered by the registration of the embossed pattern and the printed pattern during the transfer and application process.

Example 3 compared with example 1, in example 3, the surface brightness of the tablecloth was poor, and the refractive effect was poor, because the surface brightness treatment was not performed on the plain-color frosted PVC base layer after the transfer printing was attached after the embossing.

Example 4 compared to example 1, the tablecloth of example 4 was poor in softness and plasticity and poor in ductility due to the higher PVC content, the low plasticizer and filler content, and the absence of natural rubber and paraffin wax in the PVC formulation of example 5.

Example 5 compared with example 1, the surface pattern effect of the tablecloth obtained in example 5 was poor, because the matting resin content in example 5 was only 1%, the matting resin content was too low, the compounding ratio in the whole system was too small, and the matting effect on the surface of the finished product was not prominent.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. The production process of the plain frosted embossed PVC tablecloth is characterized by comprising the following steps of: the method comprises the following steps: s1: preparing a plain frosted PVC base layer; s2: manufacturing a printing film; s3: embossing, namely manufacturing an embossing pattern on the surface of the plain PVC base layer through an embossing machine; s4: laminating and transferring, namely laminating the printing film and the plain frosted PVC base layer subjected to embossing treatment at a high temperature, transferring the printing pattern on the printing film to the plain frosted PVC base layer, and ensuring the accurate registration of the embossing pattern and the printing pattern; s5: performing surface brightening treatment on the plain frosted PVC base layer subjected to attaching and transferring; s6: and (6) rolling.

2. The plain frosted embossed PVC tablecloth and the process for producing the same according to claim 1, wherein: in the S1, the raw materials of the plain frosted PVC base layer comprise, by mass, 35-75 parts of dioctyl phthalate, 20-80 parts of PVC resin powder, 50-80 parts of calcium carbonate filler, 10-20 parts of matting resin, 2-5 parts of OBSH foaming agent, 2-3 parts of natural rubber, 1-3 parts of paraffin, 0.02-0.3 part of heat stabilizer, 0.02-0.3 part of monochromatic powder and 0.01-0.2 part of processing aid; the manufacturing method of the plain frosted PVC base layer comprises the following steps: uniformly stirring the raw materials in parts by mass, repeatedly calendering until the color of the raw materials is uniform, continuously heating the soft raw material mass obtained after calendering for primary plasticization to obtain colloidal particles, heating for secondary plasticization of the colloidal particles, and carrying out calendaring molding, cooling and shaping on the colloidal particles subjected to secondary plasticization to obtain a foamed PVC layer; the oil content of the PVC resin powder is controlled to be between 75 Pa and 85 Pa, and the thickness of the plain frosted PVC base layer is between 0.25mm and 1.00 mm.

3. The plain frosted embossed PVC tablecloth and the process for producing the same according to claim 2, wherein: in S2, the printing film comprises a PET substrate layer, a pattern layer, a water-based release agent layer and a high-temperature resistant layer; the high-temperature-resistant layer is a high-barrier thin film, the pattern layer is printed on the surface of the PET substrate layer through a gravure printing process, and the water-based release agent layer comprises 55% of deionized water, 35% of modified water-based acrylic resin, 5% of ethylene glycol, 4% of a cross-linking agent and 1% of a defoaming agent in parts by mass.

4. The plain frosted embossed PVC tablecloth and the production process thereof according to claim 3, wherein: in S3, the back pressure roller of the embossing machine is at 7-10 ℃, the rotating speed is 4-8 m/min, the traction tension is 2.5 kg/cm-3.5 kg/cm, and the reeling speed is 60-90 m/min; the preheating roller temperature is between 75 ℃ and 100 ℃, the embossing roller temperature is 5 ℃ to 10 ℃ higher than that of the preheating roller, the embossing roller rotating speed is 4m/min to 8m/min, the traction tension is 2.5 kg/cm to 3.5 kg/cm, and the coiling speed is 60m/min to 90 m/min; in the embossing process, during the embossing process, the embossing roller frozen water circulation is realized, the temperature is 6-8 ℃, the pressure is 7.5 kg/cm-8.5 kg/cm, the rotating speed is 10-25 m/min, and the device can move left and right by 10-20 mm and swing up and down by 8-15 mm through manual adjustment.

5. The plain frosted embossed PVC tablecloth and the production process thereof according to claim 4, wherein: in S4, the laminating and transferring process comprises a first laminating device and a second laminating device, the temperature of the first laminating device is 120-150 ℃, the rotating speed of a preheating roller is 7 m/min-9 m/min, the traction tension is 2.5 kg/cm-3.5 kg/cm, and the coiling speed is 60m/min-90 m/min; the temperature of a cooling roller of the first laminating device is 8-10 ℃, the breadth shrinkage is less than or equal to 1cm, the rotating speed is 7-17 RPM/min, the low-speed rotating speed is 3-13 RPM/min, and the high-speed printing speed is 15-25 RPM/min; the temperature of the second laminating device is 180-190 ℃, the laminating time is 40-45 s, the traction tension is 3.0-4.0 kg/cm, the coiling speed is 20-25 m/min, the cooling group of the second laminating device comprises four groups of cooling rollers, the temperature of the first group of cooling rollers is 2-8 ℃, the cooling group is cooled and shaped for four times, the linear speed of each group is increased by 2-3 ℃ in sequence, and the cooling group is synchronized with the embossing rollers.

6. The production process of the plain-color frosted embossed PVC tablecloth of claim 5, wherein the production process comprises the following steps: in S3, the printing film and the white PVC base layer are bonded through a first bonding device and a second bonding device and then enter a vat for operation, the vat operation temperature is 180-200 ℃, a stainless steel heating tube is installed in the vat, the temperature is kept at 200 ℃, the lifting stroke is 20-30 cm, the total number of the stainless steel heating tubes is 24, the power is 3000w, and heat is conveyed to the vat through high-temperature heat conduction oil closed circulation.

7. The production process of the plain-color frosted embossed PVC tablecloth of claim 6, wherein the production process comprises the following steps: and S4, in the transfer attaching process, the contour positioning of the embossing pattern is superposed with the contour positioning of the printing pattern so as to ensure the accurate registration of the embossing pattern and the printing pattern.

8. The production process of the plain-color frosted embossed PVC tablecloth of claim 7, wherein the production process comprises the following steps: in S5, the brightening treatment method comprises the steps of conveying a finished product after the laminating to a printing machine, coating UV on the surface of the finished product, adding urea and glycerol into UV slurry, wherein the proportion of the urea to the glycerol is (3-5) to (3-4), the proportion of the urea to the glycerol in the whole UV slurry is 3-12.5%, and drying; in S6, in the winding process, pressures of a rubber winding roller, a silicone winding roller and a bending winding roller are all 3 kg/4 kg/cm, winding traction tension is 2.5 kg/3.5 kg/cm, and winding speed is 10 m/min-25 m/min.

9. The production process of the plain-color frosted embossed PVC tablecloth of claim 8, wherein the production process comprises the following steps: in S1, the raw materials of the plain frosted PVC base layer comprise, by mass, 66 parts of dioctyl phthalate, 68 parts of PVC resin powder, 52 parts of calcium carbonate filler, 6 parts of matting resin, 3.5 parts of OBSH foaming agent, 2.5 parts of natural rubber, 1.5 parts of paraffin, 0.15 part of heat stabilizer, 0.25 part of single-color powder and 0.1 part of processing aid; the processing aid comprises an anti-aging agent, an anti-ultraviolet agent and a flame retardant; the calcium carbonate filler is a mixture of light calcium carbonate with the particle size of 10-50 mu m and modified by higher fatty acid salt and heavy calcium carbonate with the particle size of 100-500 mu m and modified by higher fatty acid ester in a weight ratio of 0.5-1.5: 1. The heat stabilizer adopts calcium stearate, barium stearate and zinc stearate as main heat stabilizers, adopts hydrotalcite as an auxiliary heat stabilizer, and is compounded with the main heat stabilizer and the auxiliary heat stabilizer.

10. Plain color dull polish impressed watermark PVC tablecloth, its characterized in that: the production process of the plain ground and embossed PVC tablecloth according to any one of claims 1 to 9, wherein the integral thickness of the plain ground and embossed PVC tablecloth is 0.4 mm to 1.0 mm, and the width of the plain ground and embossed PVC tablecloth is 80cm to 145 cm.